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AUSCERT External Security Bulletin Redistribution
ESB-2015.2565
Cisco TelePresence Video Communication Server Expressway
File Modification Vulnerability
9 October 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco TelePresence Video Communication Server Expressway
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2015-6318
Original Bulletin:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151007-vcs
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Cisco Security Advisory
Cisco TelePresence Video Communication Server Expressway File Modification
Vulnerability
Medium
Advisory ID: cisco-sa-20151007-vcs
Published: 2015 October 7 20:51 GMT
Version 1.0: Final
CVSS Score: Base - 4.4
Workarounds: No workarounds available
Cisco Bug IDs: CSCuv11969 CVE-2015-6318 CWE-20
Summary
A vulnerability in the symbolic link operation of the Cisco TelePresence
Video Communication Server (VCS) Expressway could allow an authenticated,
local attacker to perform a symbolic link attack on the affected system.
The vulnerability is due to insufficient protection of files. An attacker
could exploit this vulnerability by creating a malicious symbolic link to a
location not otherwise accessible to the attacker. An exploit could allow the
attacker to insert unauthorized content in the linked-to file.
Cisco has released software updates that address these vulnerabilities.
Workarounds that mitigate these vulnerabilities are not available.
This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151007-vcs
Affected Products
Vulnerable Products Cisco TelePresence Video Communication Server version
X8.5.2 is vulnerable. Products Confirmed Not Vulnerable No other Cisco
products are currently known to be affected by these vulnerabilities.
Workarounds
Workarounds are not available.
Fixed Software
When considering software upgrades, customers are advised to consult the
Cisco Security Advisories and Responses archive at
http://www.cisco.com/go/psirt and review subsequent advisories to determine
exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded
contain sufficient memory and confirm that current hardware and software
configurations will continue to be supported properly by the new release. If
the information is not clear, customers are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance providers.
Exploitation and Public Announcements
The Cisco Product Security Incident Response Team (PSIRT) is not aware of
any public announcements or malicious use of the vulnerability that is
described in this advisory.
URL
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151007-vcs
Revision History
Version Description Section Status Date
1.0 Initial public release. NA Final 2015-October-07
Legal Disclaimer
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR
MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE
RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits
the distribution URL is an uncontrolled copy, and may lack important
information or contain factual errors. The information in this document is
intended for end users of Cisco products.
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